Fluid manifold control device

ABSTRACT

A manifold is disclosed which includes a manifold body that defines a main lumen, a primary injection line and a port. A check valve system is also provided which permits flow from the primary injection line to the main lumen while selectively preventing back flow from the main lumen to the primary injection line and, simultaneously, permitting flow from the port to the primary injection line while preventing back flow from the primary injection line to the port.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 10/430,716 filed May 6, 2003, entitled, FLUID MANIFOLD CONTROL DEVICE, in the names of Kathryn Mary Usher, Colin Hart and Thomas Deyette Jr., which application is incorporated by reference as though fully set forth herein.

FIELD OF THE INVENTION

The present invention relates generally to devices used for injecting agents during intravascular medical procedures.

BACKGROUND OF THE INVENTION

During angiography and angioplasty procedures, fluid manifolds also known as “fluids administration sets” are employed which are connected to a catheter and which enable the physician to administer saline, contrast solution and other agents and fluids to the patient.

Typical manifolds include a distal end that is connected to the catheter and a proximal end that is connected to an injection syringe or pump. The injection syringe or pump, is typically used to inject saline or a contrast agent solution into the catheter. The manifold typically includes a plurality of ports connected to the manifold through a stop cock connection. The ports are used to inject contrast solutions and other medicaments into the catheter and may also provide a connection to a pressure transducer or other analytical equipment. Further, the opening and closing of these ports typically requires the physician to rotate a stop cock handle or other manually operated valve.

Accordingly, there is a need for an improved manifold system for use with angiographic procedures which minimizes the need for manual operation of valves relating to the injection of saline and contrast fluid.

SUMMARY OF THE DISCLOSURE

A manifold control device is disclosed which can be used in catheterization and other procedures and which results in a simplified aspiration and injection of agents without the need for a manual valve operation by the physician.

An improved manifold is disclosed which comprises a main lumen having proximal and distal ends in a primary injection line connected to the proximal end of the main lumen. A port is connected to the main lumen between the proximal and distal ends thereof. A check valve is provided which permits flow between the primary injection line to the main lumen while selectively preventing back flow from the main lumen to the primary injection line. The check valve also permits flow from the port to the primary injection line while preventing back flow from the primary injection line to the port.

A method for administering fluid is also disclosed which comprises injecting fluid through a primary injection line to a main lumen while selectively preventing back flow from the main lumen to the primary injection line and injecting fluid through a port to the primary injection line while preventing back flow from the primary injection line and main lumen to the port.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic plan view of an angiographic fluid manifold made in accordance with the present invention;

FIG. 2 is another schematic plan view of an angiographic fluid manifold made in accordance with the present invention;

FIG. 3 is yet another schematic plan view of an angiographic fluid manifold made in accordance with the present invention;

FIG. 4 is yet another schematic plan view of an angiographic fluid manifold made in accordance with the present invention;

FIG. 5 is yet another schematic plan view of an angiographic fluid manifold made in accordance with the present invention;

FIG. 6A is a partial sectional view of an angiographic fluid manifold made in accordance with the present invention in a first position and at a rest condition where the syringe, contrast port and primary injection line are isolated;

FIG. 6B is another partial sectional view of the angiographic fluid manifold shown in FIG. 6A, also in the first position but at a point in time where the syringe is being filled with contrast causing the valve to be flexed to permit flow between the contrast port and the syringe during aspiration of the syringe;

FIG. 6C is another partial sectional view of the angiographic fluid manifold shown in FIGS. 6A and 6B where contrast is being injected from the syringe to the primary injection line thereby isolating the contrast port;

FIG. 7 is another partial sectional view the manifold shown in FIG. 6 but in a second position enabling free flow between the primary injection line and main lumen;

FIG. 8A is a partial sectional view of yet another angiographic fluid manifold made in accordance with the present invention and in a first position and at a rest condition where the syringe, contrast port and primary injection line are isolated;

FIG. 8B is another partial sectional view of the angiographic fluid manifold shown in FIG. 8A while still in the first position but with contrast being aspirated from the contrast port towards the syringe;

FIG. 8C is another partial sectional view of the angiographic fluid manifold shown in FIGS. 8A and 8B, again in the first position, but with contrast being injected from the syringe towards the primary injection line thereby isolating the contrast port;

FIG. 9 is another partial sectional view of the angiographic fluid manifold shown in FIG. 8 but in a second position thereby permitting free flow between the primary injection line and main lumen;

FIG. 10 is a partial schematic sectional view of yet another angiographic fluid manifold made in accordance with the present invention and in a first position thereby permitting fluid flow from the port to the primary injection line;

FIG. 11 is another partial schematic sectional view of the angiographic fluid manifold of FIG. 10 but in a second position thereby permitting flow between the primary injection line and main lumen;

FIG. 12 is a schematic plan view of another angiographic fluid manifold made in accordance with the present invention;

FIG. 13 is a partial sectional view of the angiographic fluid manifold shown in FIG. 12 in a first position permitting flow from the primary injection line to the main lumen and flow from the port to the primary injection line;

FIG. 14 is another partial sectional view of the angiographic fluid manifold shown in FIG. 12 in a second position thereby permitting flow from the primary injection line to the port; and

FIG. 15 is another partial sectional view of the angiographic fluid manifold shown in FIG. 12 but in a third position thereby permitting free flow between the primary injection and main lumen.

DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS

FIG. 1 illustrates a manifold 15 which includes a distal end 16 with a male connection 17 that can be connected to a catheter (not shown). The system 15 also includes a proximal end 18 with a female connection 19 that may be connected to a syringe (not shown). The proximal end 18 and syringe (not shown) define a primary injection line 21. The system 15 further includes a manifold body 22 which has a main lumen 23 extending therethrough. In addition to the primary injection line 21, the main lumen 23 is connected to a port 24 and additional secondary ports 25, 26. Ports 24, 25, 26 are integrally connected to corresponding fluid lines (not shown). While the structure of the invention may be utilized for systems other than manifolds, it is anticipated that a primary use for the present invention may be utilized as a fluid manifold, and more particularly, for an angiographic fluid manifold. Accordingly, the port 24 will typically be connected to a contrast fluid or solution reservoir (not shown) via corresponding fluid lines (not shown). The additional ports 25, 26 may be connected to a pressure transducer or other analytical device (not shown) or may serve as a waste or fluid collector (not shown). The ports may be opened and closed with the stop cocks shown at 27, 28. The stop cocks 27, 28 are easily manipulated by way of the handles 31, 32.

In operation, a syringe connected to the female connector 19 of the primary injection line 21 can be used to inject saline or other fluid through the main lumen 23 to the catheter (not shown). The check valve 33 permits flow from the primary injection line 21, through the main lumen 23 to the catheter (not shown). The check valve 33 also prevents back flow from the main lumen 23 towards the primary injection line and syringe (not shown). Thus, the saline supply or other fluid at the syringe (or other pumping means such as, for example, an electric or manual pump) will not be contaminated by fluid disposed upstream in the main lumen 23 or catheter (not shown).

To inject fluid, e.g. contrast fluid from the port 24 to the main lumen, the syringe or other pump (not shown) is aspirated by creating a pressure drop in the direction of the arrow 34. As fluid flow in this direction from the main lumen 23 is prevented by the check valve 33, fluid flows from the port 24 in the direction of the arrow 35 and through the primary injection line 21. The fluid flows past the check valve 36. Fluid from the port, e.g., now being retained in the syringe or pump connected to the primary injection line, said fluid may be injected into the main lumen by generating pressure at the syringe or pump and create a pressure drop in the direction of the arrow 37 thereby causing the fluid that originated in the port 24 to flow past the check valve 33 in the direction of the arrow 38, into the main lumen and thereafter into the catheter (not shown). The check valve 36 prevents back flow from the syringe or pump (not shown) connected to the primary injection line 21 from flowing past the check valve 36, into the port 24 and thereby contaminating the supply or reservoir or fluid connected to the port 24.

Thus, both the supply of saline or other fluid retained in the syringe or pump connected to the port 24 and the fluid, such as contrast fluid retained in the reservoir connected to the port 24 may be protected from contamination. The fluid retained in the reservoir connected to the port 24 may be protected from contamination both by fluid retained in the syringe or pump connected to the primary injection line 21 as well as fluid disposed in the main lumen 23 upstream of the check valve 33. Any fluid retained in the syringe or pump connected to the primary injection line 21 may be protected from contamination by any fluid disposed in the main lumen upstream of the check valve 33.

Using like reference numerals to refer to like or similar parts but with the suffix “a” an alternative embodiment system 15 a is shown in FIG. 2. Instead of the check valve 36 a being disposed in the port 24 a, the two check valves 33 a, 36 a are disposed within a body 41. The body 41 includes a first lumen 42 and a second lumen 43. The first lumen 42 is disposed at least partially in the main lumen 23 a and, in the embodiment shown in FIG. 2, accommodates both check valves 33 a and 36 a. The first and second lumens 42, 43 are connected to form a t-connection. As an alternative, the check valve 36 a may be disposed in the second lumen 43 which is at least partially disposed within the port 24 a.

Again using like reference numerals for like or similar parts except for the suffix “b,” the check valve 33 b of FIG. 3 is connected to a push button mechanism 44 which includes a movable body 45 which is connected to the check valve 33 b as well as the body 22 b which defines the main lumen 23 b. Movement of the movable body 45 causes the check valve 33 b to be disposed either in the main lumen 23 b or be removed from the main lumen 23 b.

In a further embodiment illustrated in FIG. 3, a movable body 45 c as shown in FIG. 4 is rotatably connected to the manifold body 22 c. The check valve 33 c is disposed in the rotatable body 45 c and can be moved from an activated position as shown in FIG. 4 where the handle 46 is disposed parallel to the main lumen 23 c to the deactivated position shown in phantom in FIG. 4 where the check valve 33 c is removed from the main lumen 23 c. In the embodiment 15 c shown in FIG. 4, the check valve 36 c is disposed in the port 24 c.

In contrast, in the embodiment 15 d shown in FIG. 5, the check valve 36 d is disposed within a check valve line 48 that, along with a mechanical valve line are disposed between tube splitters 51, 52. The tube splitters 51, 52 are connected to the port 24 d by way of the tubing 53 and male connector 54. The tubing 55 is connected to a fluid reservoir, such as, for example, a contrast fluid reservoir (not shown). The mechanical valve line 49 accommodates a manually operable mechanical valve 56. The check valve line 48 and mechanical valve line 49 may be rotated so as to permit one of the lines 48, 49 to be in communication with the tubings 53, 55 at a time.

The embodiment 15 d shown in FIG. 5 is particularly useful if the syringe or pump connected to the primary injection line 21 d has excess fluid in it or an air bubble. For example, excess contrast fluid may be injected from the primary injection line 21 d back through the port 24 d by rotating the lines 48, 49 so that the mechanical valve line 49 is in communication with the tubings 53, 55 and the valve 56 is opened. Thus, excess contrast fluid can be saved instead of wasted.

Turning to FIGS. 6A-73 certain embodiments of the check valve are explained. For purposes of example, a dual check valve will be explained in greater detail. In FIGS. 6A-6C and 7, the embodiment 15 e provides a dual check valve mechanism by way of the sliding actuator or body 61. The body 61 comprises the port 24 e, the female connector 29 e, a palm pad 62 and a cylindrical wall 63 that defines a first lumen 64 disposed between the wall 63 and the check valve element 65 and a second lumen 66 that is disposed within the cylindrical wall 63. The wall 63 includes a protuberance 67.

The valve element 65 is fixed with respect to the manifold body 22 e. The actuator body 61 slides within the cavity 68 disposed within the manifold body 22 e and into which the main lumen 23 e and primary injection line 21 e extend. In FIGS. 6A-6C, the actuator body 61 is in a first position whereby the first lumen 64 is in-line with the primary injection line 21 e and main lumen 23 e. In the rest position shown in FIG. 6A, the valve element 65 engages the protuberance 67 and the combination of the valve element 65 and protuberance 67 isolates the primary injection line 21 e, main lumen 23 e and contrast port 24 e from one another. As contrast is aspirated in the direction of the arrow 15 e, pressure generated in the port 24 e biases the valve element 65 towards the right as shown in FIG. 6B and around protuberance 67 to permit fluid flow in the direction of the arrows 15 e and 34 e (see FIG. 6B). As shown in FIG. 6C, when the contrast is injected from the syringe in the direction of the arrow 37 e to the main lumen 23 e, the valve element 65 is biased towards the left thereby isolating the secondary injection port 24 e and permitting flow in the direction of the arrows 37 e and 38 e.

Thus, in the first position shown in FIGS. 6A-6C, the secondary injection port 24 e, the primary injection port 21 e and the main lumen 23 e may be isolated (FIG. 6A) or, pressure in the secondary injection port 24 e can bias the valve element 65 to the right and around the protuberance 67 to permit flow in the direction of the arrows 35 e, 34 e as shown in FIG. 6B, or, the valve element 65 may be biased to the left when pressure is generated in the primary injection port 21 e by action of the syringe pumping fluid in the direction of the arrows 37 e, 38 e thereby permitting fluid, such as contrast, to flow from the syringe to the main lumen 23 e.

Turning to FIG. 7, the actuator body 61 has been moved to the left relative to the 72 and protuberance 67 thereby placing the second lumen 66 in-line with the main lumen 23 e and primary injection line 21 e. In this position, flow between the primary injection line 21 e and main lumen 23 e is provided and the port 24 e is isolated from both the primary injection line 21 e and main lumen 23 e. Specifically, the first-lumen 64 is blocked at both ends by the walls 71, 72 of the cavity 68. A spring 73 may be utilized to bias the actuator body 61 into the position shown in FIGS. 6A-6C. The spring bias may be overcome by applying pressure to the palm pad 62 in the direction of the arrow 74.

The actuator body 61 may be unitary in design or fabricated from multiple components. The portions of the actuator body 61 defining the lumens 64 and 66 may be retained within the cavity 68 along with the spring 73 by way of the retainer plate 74. The palm pad 62 may be threadably connected or otherwise attached to the handle 75 after the handle 75 is extended through the aperture 76 disposed in the wall 77.

In the embodiment 15 f shown in FIGS. 8A-8C and 9, instead of a palm pad 62 and handle 75 as shown in FIGS. 6A-6C and 7, finger grips 81, 82 are attached to the actuator body 61 f between the port 24 f and retainer plate 74 f. The spring 73 f is trapped between the cylindrical wall 63 f of the actuator body 61 f and the wall 77. The remaining elements are identical or functionally equivalent to the elements described above in FIGS. 6A-6C and 7.

Turning to FIGS. 10 and 11, the embodiment 15 g includes a sliding actuator body 61 g of a different configuration than the sliding actuator bodies 61 and 61 f shown in FIGS. 6-7 and 8-9, respectively. Specifically, while the actuator body 61 g includes two lumens 64 g, 66 g like the lumens 64, 66 and 64 f, 66 f shown in FIGS. 6-7 and 8-9, respectively, the lumen 64 g includes a one-way check valve 83 that protects the primary injection line 21 g and port 24 g from back flow from the main lumen 23 g. The check valve 83 does not protect the port 24 g from back flow from the primary injection line 21 g or syringe port. Instead, an additional check valve 84 is disposed upstream in the tubing shown at 53 g, 55 g. In the position shown in FIG. 10, fluid may be pumped through the check valve 84 in the direction of the arrow 35 g, through the port 24 g, through the lumen 64 g and into the primary injection line 21 g in the direction of the arrow 34 g. The one-way check valve 83 prevents any contrast fluid from being pumped or drawn into the main lumen 23 g during the aspiration of the syringe or pump mechanism (not shown). Upon syringe or pump injection, fluid is then pumped in the direction of the arrow 37 d, through the one-way check valve 83 and into the main lumen 23 g. The check valve 84 prevents any contaminated contrast solution from being injected or pumped into the contrast solution reservoir which is upstream of the tubing 55 g. The actuator body 61 g is accommodated within a sleeve 85 that is fixed to the manifold body 22 g. The sleeve 85 is accommodated in a slot 86 disposed on the outer surface of the actuator body 61 g. The actuator body can be slid from the first position shown in FIG. 10 to the second position shown in FIG. 11 by pushing or pulling on either of the handles 87, 88. In the position shown in FIG. 11, the lumen 66 g is in-line between the primary injection line 21 g and the main lumen 23 g thereby providing uninhibited flow between the primary injection line 21 g and main lumen 23 g.

A further embodiment of a manifold system 15 h is illustrated in FIGS. 12-15. In the system 15 h, a rotating valve body 91 is disposed at the junction of the primary injection line 21 h, port 24 h and main lumen 23 h. As shown in FIGS. 13-15, the rotating valve body 91 has three positions and movement between these positions can be effectuated by the handle 91 a. In FIG. 13, the valve body 91 is a first position whereby the first lumen 42 h of the body 41 h is in-line between the primary injection line 21 h and main lumen 23 h. The check valve 33 h prevents back flow from the main lumen 23 h towards the main injection line 21 h. The check valve 36 h disposed in the second lumen 43 h of the body 41 h prevents back flow from the body 41 h and the primary injection line 21 h to the port 24 h. Thus, in the position shown in FIG. 13, fluid may flow from the primary injection 21 h to the main lumen 23 h and from 24 h to 21 h.

Turning to FIG. 14, the valve body 91 has been rotated 45. degree. so that the check valve 33 h is disposed in-line with the port or contrast line 24 h. The check valve 36 h is disposed in-line with the primary injection line 21 h. The position shown in FIG. 14 is useful to dump excess contrast solution from the syringe or pump (not shown) back into the port 24 h. Thus, excess contrast solution may be pumped from the primary injection line 21 h through the check valves 36 h, 33 h and back into the port 24 h to the contrast reservoir (not shown). The position shown in FIG. 14 is useful in the event that no injection has taken place for a period of time during a procedure. Instead of wasting contrast solution which may have been aspirated into the syringe or pump (not shown), the excess solution or solution that is not currently needed may be transferred into the port 24 h instead of being wasted.

Turning to FIG. 15, the valve body 91 has been further rotated so that the tertiary lumen 92 is disposed in-line between the primary injection line 21 h and main lumen 23 h. The position shown in FIG. 15 is useful for aspirating the catheter. Fluid may be drawn through the main lumen 23 h in the direction of the primary lumen 21 h and aspirated into the syringe or pump and then pumped in the reverse direction toward one of the secondary ports 25 h, 26 h which can be used as a dump or waste collection.

Thus, an improved angiographic manifold is provided which, in turn, provides check valve protection for both the syringe or saline pump port as well as check valve protection for the contrast fluid reservoir without requiring the physician to manipulate cumbersome stop cock valves. In many of the embodiments, contrast fluid may be drawn into the syringe or pump from the contrast fluid reservoir and injected through the main lumen without manipulating any valve and while providing check valve protection against contamination from fluid disposed in the main lumen.

Although the disclosed devices and methods have been described with reference to preferred embodiments, those skilled in the art will recognize that changes may be made in form and detail with departing from the spirit and scope of this disclosure. As such, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting and it is the following claims, including all equivalents thereof, which are intended to define the scope of the claimed invention. 

1. A manifold comprising: a main lumen having proximal and distal ends, a primary injection line connected to the proximal end of the main lumen, a port connected to the main lumen between the proximal and distal ends thereof, a check valve permitting flow from the primary injection line to the main lumen while selectively preventing back flow from the main lumen to the primary injection line and permitting flow from the port to the primary injection line while preventing back flow from the primary injection line to the port.
 2. The manifold of claim 1 wherein the valve is a dual check valve.
 3. The manifold of claim 2 wherein the dual check valve comprises a first check valve disposed in-line between the primary injection line and the main lumen and a second check valve disposed in-line between the primary injection line and the port.
 4. The manifold of claim 2 wherein the dual check valve comprises a body comprising a first lumen at least partially disposed in the main lumen and a second lumen connected to the first lumen to form a T-connection and extending at least partially into the port, and wherein the dual check valve comprises a first check valve disposed in the body and between the primary injection line and the main lumen and a second check valve disposed in the body and between the primary injection line and the port.
 5. The manifold of claim 4 wherein the first check valve is disposed in the first lumen.
 6. The manifold of claim 4 wherein the second check valve is disposed in the first lumen.
 7. The manifold of claim 4 wherein the second check valve is disposed in the second lumen.
 8. The manifold of claim 4 wherein the first check valve is disposed in the first lumen and the second check valve is disposed in the first lumen between the primary injection line and the port and between the first check valve and the primary injection line and the port.
 9. The manifold of claim 3 wherein the first check valve is connected to a movable body that-permits movement of the first check valve out of the main lumen thereby deactivating the first check valve.
 10. The manifold of claim 9 wherein the movable body is movable between a first activated position where the first check valve is disposed in the main lumen and a second deactivated position where the first check valve is removed from the main lumen.
 11. The manifold of claim 10 wherein the movable body comprises a finger rest for moving the movable body from the first activated position to the second deactivated position. 12-13. (canceled)
 14. The manifold of claim 2 wherein the dual check valve comprises a check valve element disposed between the port and both the primary injection line and the main lumen, the dual check valve further comprising a movable body comprising a secondary lumen, the movable body being movable between a first position where flow from the port to the primary injection line causes the check valve element to engage the movable body and permit flow from the port to the primary injection line while isolating the main lumen from fluid flow from both the port and the primary injection line, the movable body further being movable to a second position where the secondary lumen is in-line with the main lumen and the primary injection line thereby permitting fluid flow between the primary injection line and the main lumen while isolating the port.
 15. The manifold of claim 14 wherein the movable body comprises a finger rest for moving the movable body from the first position to the second position.
 16. The manifold of claim 14 wherein the movable body comprises a palm pad for moving the movable body from the first position to the second position.
 17. The manifold of claim 14 wherein the movable body comprises at least one finger grip for moving the movable body from the first position to the second position.
 18. The manifold of claim 2 wherein the dual check valve comprises a movable body extending transversely between the primary injection line and the main lumen, the movable body comprising a first end connected to the port, the movable body further comprising a secondary lumen and a tertiary lumen, the secondary lumen extending between the port and the primary injection line when the movable body is in a first position, the secondary lumen accommodating a one-way check valve that permits flow from the secondary injection line to the primary injection line when the movable body is in the first position and prevents flow from the main lumen to the primary injection line and the port when the movable body is in the first position, the tertiary lumen extending between the primary injection line and the main lumen when the movable body is in a second position, the port further comprising a second check valve that prevents flow from the main lumen or primary injection line to the port.
 19. The manifold of claim 18 wherein the movable body comprises a finger rest for moving the movable body from the first position to the second position.
 20. The manifold of claim 18 wherein the movable body comprises a palm pad for moving the movable body from the first position to the second position.
 21. The manifold of claim 18 wherein the movable body comprises at least one finger grip for moving the movable body from the first position to the second position.
 22. A fluid manifold comprising: a main lumen having proximal and distal ends, a primary injection line connected to the proximal end of the main lumen, a port connected to the main lumen between the proximal and distal ends thereof, a dual check valve comprising a first check valve disposed in-line between the primary injection line and the main lumen for permitting flow from the primary injection line to the main lumen while preventing back flow from the main lumen to the primary injection line and a second check valve disposed in-line between the primary injection line and the port permitting flow from the port to the primary injection line while selectively preventing back flow from the primary injection line to the port.
 23. The manifold of claim 22 wherein the first check valve is connected to a movable body that permits movement of the first check valve out of the main lumen thereby deactivating the first check valve.
 24. The manifold of claim 23 wherein the movable body is movable between a first activated position where the first check valve is disposed in the main lumen and a second deactivated position where the first check valve is removed from the main lumen.
 25. The manifold of claim 24 wherein the movable body comprises a finger rest for moving the movable body from the first activated position to the second deactivated position. 26-27. (canceled)
 28. A manifold comprising: a main lumen having proximal and distal ends, a primary injection line connected to the proximal end of the main lumen, a port connected to the main lumen between the proximal and distal ends thereof, a body comprising a first lumen at least partially disposed in the main lumen and a second lumen connected to the first lumen to form a T-connection and extending at least partially into the port, and a dual check valve comprising a first check valve disposed in the body and between the primary injection line and the main lumen and a second check valve disposed in the body and between the primary injection line and the port.
 29. The manifold of claim 28 wherein the first check valve is disposed in the first lumen.
 30. The manifold of claim 28 wherein the second check valve is disposed in the first lumen.
 31. The manifold of claim 28 wherein the second check valve is disposed in the second lumen.
 32. The manifold of claim 28 wherein the first check valve is disposed in the first lumen and the second check valve is disposed in the first lumen between the primary injection line and the port and between the first check valve and the primary injection line and the port.
 33. A manifold comprising: a main lumen having proximal and distal ends, a primary injection line connected to the proximal end of the main lumen, a port connected to the main lumen between the proximal and distal ends thereof, a dual check valve comprising a check valve element disposed between the port and both the primary injection line and the main lumen, the dual check valve further comprising a movable body comprising a secondary lumen, the movable body being movable between a first position where flow from the port to the primary injection line causes the valve element to engage the movable body and permit flow from the port to the primary injection line while isolating the main lumen from fluid flow from the primary injection line and the port, the movable body further being movable to a second position where the movable body engages the valve element and isolates the port from fluid flow from both the primary injection line and the main lumen and further where the secondary lumen is in-line with the main lumen and the primary injection line thereby permitting fluid flow between the primary injection line and the main lumen, the port further comprising a second check valve that prevents flow from the main lumen or primary injection line to the port.
 34. The manifold of claim 33 wherein the movable body comprises a finger rest for moving the movable body from the first position to the second position.
 35. The manifold of claim 33 wherein the movable body comprises a palm pad for moving the movable body from the first position to the second position.
 36. The manifold of claim 33 wherein the movable body comprises at least one finger grip for moving the movable body from the first position to the second position.
 37. A manifold comprising: a main lumen having proximal and distal ends, a primary injection line connected to the proximal end of the main lumen, a port connected to the main lumen between the proximal and distal ends thereof, a movable body extending transversely between the primary injection line and the main lumen, the movable body comprising a first end connected to the port, the movable body further comprising a secondary lumen and a tertiary lumen, the secondary lumen extending between the secondary injection line and the primary injection line when the movable body is in a first position, the secondary lumen accommodating a one-way check valve that permits flow from the port to the primary injection line when the movable body is in the first position and prevents flow from the primary injection line and the main lumen to the port when the movable body is in the first position, the tertiary lumen extending between the primary injection line and the main lumen when the movable body is in a second position.
 38. The manifold of claim 35 wherein the movable body comprises a finger rest for moving the movable body from the first position to the second position.
 39. The manifold of claim 35 wherein the movable body comprises a palm pad for moving the movable body from the first position to the second position.
 40. The manifold of claim 35 wherein the movable body comprises at least one finger grip for moving the movable body from the first position to the second position. 41-44. (canceled)
 45. A method of administering fluids, the method comprising: injecting fluid through a primary injection line to a main lumen while selectively preventing back flow from the main lumen to the primary injection line and injecting fluid through a port to the primary injection line while preventing back flow from the primary injection line and main lumen to the port.
 46. The method of claim 45 wherein the injecting of fluid through the primary injection line to the main lumen further comprises injecting said fluid through a first check valve disposed between the primary injection line and the main lumen for preventing back flow from the main lumen to the primary injection line, and the injecting of fluid through the port to the primary injection line further comprises injecting said fluid through a second check valve disposed between the port and the primary injection line for preventing back flow from the primary injection line and main lumen to the port.
 47. The method of claim 46 wherein the injecting of fluid through the port to primary injection line further comprises injecting said fluid through a movable body that is in a first position where flow through a check valve element causes the check valve element to engage the movable body and permit flow from the port to the primary injection line while isolating the main lumen from fluid flow from both the port and primary injection lines, and the injecting of fluid through the primary injection line to the main lumen further comprises injecting said fluid though the movable body while the movable body is in a second position where a secondary lumen passing through the movable body is in-line with the main lumen and the primary injection line thereby permitting fluid flow between the primary injection line and the main lumen while isolating the port.
 48. The method of claim 45 wherein the injecting of fluid through the port to primary injection line further comprises injecting said fluid through a movable body that is in a first position wherein the movable body comprises secondary lumen extending between the port and the primary injection line when the movable body is in a first position, the secondary lumen accommodating a one-way check valve that permits flow from port to the primary injection line when the movable body is in the first position and prevents flow from the primary injection line and the main lumen to the port when the movable body is in the first position, and the injecting of fluid from the primary injection line to the main lumen further comprises injecting said fluid through the movable body when the movable body is in a second position wherein the movable body further comprises a tertiary lumen extending between the primary injection line and the main lumen when the movable body is in a second position and the movable body isolates the port when the movable body is in the second position. 